Maria is selling chips and candy bars. If she wants to sell each bag of chips, c, for $1. 50 and each candy bar, b, for $1. 20, which equation would represent her possible sales, S(c, b)?.

Awoman has 14 different shirts: 10 white shirts and 4 red shirts. if she randomly chooses 2 shirts to take with her on vacation, then what is the probability that she will choose two white shirts? show your answer in fraction and percent, round to the nearest whole percent.